La Madre Muerta on AllMovie

Ismael ( Karra Elejalde) is a thief who, as this thriller opens, is robbing the home of a woman painter. When she unexpectedly returns while he is riffling through her possessions, he kills her without a second thought. At some point as he is escaping the scene, however, he discovers that the painter's daughter has witnessed the whole thing. Ten years later, he spies a young woman (Ana Alvarez) on the streets and feels certain that this is the one woman who could put him into prison. He kidnaps her, only to discover that she is permanently crazed, and has no capacity for doing much. Nonetheless, he keeps her tied up in a bed upstairs, much to the irritation of his girlfriend (Lio), who soon takes matters into her own hands.